1 files changed, 50 insertions, 0 deletions
diff --git a/lld/ELF/ScriptParser.h b/lld/ELF/ScriptParser.h
new file mode 100644
index 00000000000..9db5d32cebd
--- /dev/null
+++ b/lld/ELF/ScriptParser.h
@@ -0,0 +1,50 @@
+//===- ScriptParser.h -------------------------------------------*- C++ -*-===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_ELF_SCRIPT_PARSER_H
+#define LLD_ELF_SCRIPT_PARSER_H
+
+#include "lld/Core/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+
+namespace lld {
+namespace elf {
+
+class ScriptParserBase {
+public:
+  ScriptParserBase(StringRef S) : Input(S), Tokens(tokenize(S)) {}
+  virtual ~ScriptParserBase() = default;
+
+  virtual void run() = 0;
+
+protected:
+  void setError(const Twine &Msg);
+  static std::vector<StringRef> tokenize(StringRef S);
+  static StringRef skipSpace(StringRef S);
+  bool atEOF();
+  StringRef next();
+  StringRef peek();
+  bool skip(StringRef Tok);
+  void expect(StringRef Expect);
+
+  size_t getPos();
+  void printErrorPos();
+
+  std::vector<uint8_t> parseHex(StringRef S);
+
+  StringRef Input;
+  std::vector<StringRef> Tokens;
+  size_t Pos = 0;
+  bool Error = false;
+};
+
+} // namespace elf
+} // namespace lld
+
+#endif